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Method for prolonging service life of lead-acid storage battery or battery pack

A technology for lead-acid storage batteries and battery packs, applied in secondary battery charging/discharging, secondary battery repair/maintenance, electrolyte/reactant regeneration, etc., can solve early capacity loss, poor contact between active material and conductive current collector, Negative specific surface area shrinkage and other issues

Pending Publication Date: 2018-02-23
杨春晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for improving or extending the service life of lead-acid batteries or battery packs, especially by solving or improving the softening or / and falling off of the positive active material of lead-acid batteries or battery packs , Negative electrode specific surface area shrinkage, corrosion, passivation, early capacity loss, sulfation, poor contact between active material and conductive current collector, to improve or prolong the service life of lead-acid batteries or battery packs

Method used

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  • Method for prolonging service life of lead-acid storage battery or battery pack
  • Method for prolonging service life of lead-acid storage battery or battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0076] The lead-acid storage battery of this embodiment is a planar grid-type lead-acid storage battery with a rated capacity of 2.32Ah (2h rate, 25°C) and a rated voltage of 2V. Charge with constant current at a rate of 0.2 (rated capacity, the same below), when the voltage reaches 2.65V, charge at a constant voltage of 2.65V, the total time for two charges is 6 hours and 24 minutes, and then charge at a rate of 2h, 80% DOD ( depth of discharge) after discharging, repeat the above charging and discharging process, that is, work through the above charging and discharging cycle, and the working environment temperature is 25±1°C. During the cycle charge and discharge operation and polarity reversal of the battery in this embodiment and the subsequent charge or charge and discharge operation, factors such as fluid loss, open circuit, short circuit, mechanical damage, and test failure are eliminated or prevented. result interference.

[0077] When the remaining capacity of the le...

Embodiment 2

[0108]The method for improving or prolonging the service life of the lead-acid storage battery or battery pack in this embodiment is that when the lead-acid storage battery or battery pack in this embodiment softens or / and falls off due to positive active material, negative electrode specific surface area shrinks, electrode passivation, corrosion, early One or more failure modes or problems of capacity loss, sulfation, poor contact between active material and current collector, resulting in a decrease in the working discharge capacity of the cell or battery pack, or when it is necessary to prevent or mitigate the above seven failure modes Or when the problem damages the working ability of the lead-acid battery or battery pack, or when the work of the lead-acid battery or battery pack in this embodiment reaches a certain number of cycles or float charging time, the positive and negative poles of the lead-acid battery or battery pack in this embodiment Carry out the following pol...

Embodiment 3

[0112] The implementation steps and operations of carrying out the polarity reversal of the present invention and the subsequent charging or charging and discharging operations of the lead-acid battery pack (rated capacity of 2h rate is 2Ah, rated voltage is 4V, 25°C) in this embodiment are the same as the present invention The steps and operations implemented on the battery in Invention Example 1 are basically the same, the difference is that in the operation of this example, the polarity reversal and the subsequent charging or discharging operation are applied to the positive electrode of the lead-acid battery pack and negative pole.

[0113] In other implementations of this embodiment, the charging stop voltage after each polarity reversal is 3.0V or 4.5V.

[0114] In other implementations of this embodiment, the polarity reversal and subsequent charging or charging and discharging operations of the present invention can also be performed on a single battery or some single ...

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Abstract

The invention discloses a method for prolonging the service life of a lead-acid storage battery or a battery pack. The method comprises the steps that positive and negative poles of the lead-acid storage battery or the battery pack are reversed in polarity and undergo later charging or discharging operations, and the total times of the accumulated operations is greater than or equal to 1. By adopting the method, the service life of the lead-acid storage battery or the battery pack can be remarkably prolonged.

Description

technical field [0001] The invention relates to improving or prolonging the service life of a storage battery or a battery pack, in particular to a method for improving or prolonging the service life of a lead-acid storage battery or a battery pack. Background technique [0002] Due to its low manufacturing cost, high performance / price ratio, safety, stability, and recyclability, lead-acid batteries or battery packs have been widely used for many years and occupy the leading position in the sales share of the secondary battery market. However, in terms of performance, lead-acid batteries or battery packs show the disadvantages of low specific energy and short service life. At present, the specific energy of lead-acid batteries or battery packs in application is about 20-40Wh / kg, and the cycle life is about 20-40Wh / kg. 150-1500 times, the life of floating charge is about 5-20 years. There are many factors that affect the service life of lead-acid batteries or battery packs, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/44
CPCH01M10/4242H01M10/44Y02E60/10
Inventor 杨春晓
Owner 杨春晓
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